Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 170gr | Prvi Partizan FSP bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 54,549 psi | 90% | 2995 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 52,678 psi | 86% | 2989 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 52,765 psi | 87% | 3081 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 54,955 psi | 90% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,606 psi | 88% | 3035 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 54,737 psi | 90% | 3087 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,768 psi | 62% | 2789 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,518 psi | 86% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,461 psi | 88% | 3048 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,476 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,069 psi | 87% | 3022 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,099 psi | 89% | 3084 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,752 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,413 psi | 78% | 2999 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,100 psi | 90% | 3156 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,069 psi | 87% | 3064 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 53,330 psi | 88% | 2946 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,099 psi | 89% | 3084 fps | 98.7% |
| Bofors RP7 | <<locked>> | 86% | 52,678 psi | 86% | 2933 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,920 psi | 77% | 2933 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 53,534 psi | 88% | 2963 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,592 psi | 90% | 3038 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,157 psi | 89% | 2995 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 54,911 psi | 90% | 3028 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,766 psi | 88% | 3009 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,867 psi | 88% | 2969 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,514 psi | 76% | 3041 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 54,795 psi | 90% | 3074 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 60% | 1880 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,288 psi | 89% | 2936 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,853 psi | 88% | 2969 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,099 psi | 89% | 2959 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 53,127 psi | 87% | 2979 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,040 psi | 87% | 2959 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 98% | 52,330 psi | 86% | 3058 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 54,752 psi | 90% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,404 psi | 89% | 2959 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 52,533 psi | 86% | 2949 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,414 psi | 79% | 2897 fps | 99.4% |
| Norma 204 | <<locked>> | 90% | 54,476 psi | 89% | 3022 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 53,751 psi | 88% | 3107 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 54,882 psi | 90% | 3025 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,721 psi | 87% | 3077 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 53,650 psi | 88% | 3028 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,749 psi | 83% | 3009 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 61% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,345 psi | 88% | 2946 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,882 psi | 88% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,431 psi | 86% | 3009 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,650 psi | 90% | 3097 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,760 psi | 77% | 3038 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 53,432 psi | 88% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,114 psi | 90% | 3002 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 94% | 52,286 psi | 86% | 3005 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 86% | 52,678 psi | 86% | 2933 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,404 psi | 89% | 2959 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,752 psi | 90% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,533 psi | 86% | 2949 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,853 psi | 90% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,114 psi | 89% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,940 psi | 89% | 2910 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 51,851 psi | 85% | 3002 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 53,388 psi | 88% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,287 psi | 87% | 2936 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 54,621 psi | 90% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,953 psi | 87% | 2982 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 54,549 psi | 90% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,374 psi | 88% | 2966 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,359 psi | 86% | 2956 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 88% | 52,518 psi | 86% | 2969 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,838 psi | 88% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,896 psi | 88% | 3100 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,487 psi | 81% | 3005 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,736 psi | 87% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,824 psi | 90% | 3045 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,821 psi | 83% | 3140 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,823 psi | 87% | 2972 fps | 98.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 31,618 psi | 52% | 2536 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 40,074 psi | 66% | 2756 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 49,153 psi | 81% | 3012 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,573 psi | 80% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,147 psi | 68% | 2792 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 44,860 psi | 74% | 2897 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 35,476 psi | 58% | 2726 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,313 psi | 81% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,653 psi | 63% | 2762 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,121 psi | 72% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,988 psi | 67% | 2789 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,292 psi | 68% | 2838 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,529 psi | 47% | 2510 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,329 psi | 53% | 2638 fps | 96% |
| Alliant Reloder-26 | 68.9 gr | 80% | 30,618 psi | 50% | 2628 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 40,872 psi | 67% | 2828 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,748 psi | 82% | 2890 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,292 psi | 68% | 2838 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 43,671 psi | 72% | 2766 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 43,903 psi | 72% | 2871 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,995 psi | 82% | 2904 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,785 psi | 69% | 2799 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,527 psi | 73% | 2818 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 47,877 psi | 79% | 2904 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,079 psi | 77% | 2887 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,274 psi | 60% | 2648 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,276 psi | 63% | 2841 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,785 psi | 67% | 2812 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,111 psi | 84% | 2887 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,204 psi | 64% | 2687 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,020 psi | 74% | 2795 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 38,232 psi | 63% | 2700 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,760 psi | 77% | 2844 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 45,803 psi | 75% | 2930 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,372 psi | 84% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,627 psi | 70% | 2743 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 40,872 psi | 67% | 2726 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 32,866 psi | 54% | 2569 fps | 95.7% |
| Norma 204 | <<locked>> | 82% | 41,495 psi | 68% | 2776 fps | 95.5% |
| Norma MRP | 70.2 gr | 84% | 35,375 psi | 58% | 2726 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 39,639 psi | 65% | 2746 fps | 99% |
| Ramshot Grand | <<locked>> | 94% | 45,687 psi | 75% | 2940 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 38,348 psi | 63% | 2730 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 37,797 psi | 62% | 2743 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 46% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,922 psi | 82% | 2887 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,833 psi | 77% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,711 psi | 65% | 2769 fps | 98.9% |
| ReloadSwiss RS 70 | 68.2 gr | 80% | 38,334 psi | 63% | 2779 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,244 psi | 58% | 2753 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 47,065 psi | 77% | 2838 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,556 psi | 75% | 2828 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 39,987 psi | 66% | 2766 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 43,671 psi | 72% | 2766 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,627 psi | 70% | 2743 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 51,372 psi | 84% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,872 psi | 67% | 2726 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,066 psi | 79% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,892 psi | 79% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,655 psi | 68% | 2684 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,624 psi | 65% | 2759 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,166 psi | 77% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,688 psi | 77% | 2818 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,085 psi | 59% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,159 psi | 63% | 2694 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 45,092 psi | 74% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,046 psi | 67% | 2743 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 37,579 psi | 62% | 2671 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 40,321 psi | 66% | 2743 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 31,662 psi | 52% | 2589 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 92% | 47,050 psi | 77% | 2972 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 46,311 psi | 76% | 2940 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,958 psi | 66% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,930 psi | 69% | 2802 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,164 psi | 41% | 2484 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,045 psi | 66% | 2733 fps | 95.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 83 powders for .300 Blaser Mag. loaded with the .308 | 170gr | Prvi Partizan FSP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,156 fps. ADI AR 2217 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Blaser Mag. with the .308 | 170gr | Prvi Partizan FSP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.